A product that pays for itself in a reasonable period of time is usually a good buy. Consider, for example, a thermostat that automatically adjusts the temperature of a house to the appropriate level, day or night.This device ensures that in wintertime the house is 70 degrees when a person gets up in the morning, 50 when he's at work, 68 when he gets home, 72 after dinner,and 62 while he sleeps.
If what the ad claims is true, the thermostat will pay for itself in energy savings within one year. If it doesn't, the manufacturer will buy it back.
When you multiply that savings by the projected life of the unit, it is obviously a good buy. Yet interestingly enough, most of us would be hesitant to put out the $79 to purchase the unit. But why, if it is such a value?
This question has a spiritual counterpart. Often we are even slower to come up with the faith necessary to make wise spiritual investments.
